On Jan 15th 2020 The Aviation Herald received information based on a screenshot reportedly showing the report of the captain of the flight, that the aircraft was on approach to Dire Dawa's runway 15 when the aircraft entered a swarm of locust, it was like rain. The windscreen wipers were not able to clear the windshield anymore. The crew went around, climbed to 8500 feet, depressurized the aircraft, opened the cockpit side window and cleaned the windscreen by hand. The same happened on second approach to Dire Dawa. The crew again climbed to 8500 feet, cleaned the windscreen by hand again and diverted to Addis Ababa.

I got hit by a swarm of some kind of bugs going into Colorado springs. Was at about 10,000 feet on the downwind descent if I recall. Was still able to see, but what a mess. Gave the line guy $20 to gently remove the bugs from the windscreen before they got baked on. That was weird.

Even so, the 737 autoland is fail-passive, not fail-active. The autopilot can not track centerline during the rollout. You disconnect the autopilot at touchdown and manage the landing roll manually. Difficult to do if you can't see out the window. (That's why the 737 autoland CATIII has a DH of 50' instead of the 100' Alert Height of fail-active autoland aircraft)

Even so, the 737 autoland is fail-passive, not fail-active. The autopilot can not track centerline during the rollout. You disconnect the autopilot at touchdown and manage the landing roll manually. Difficult to do if you can't see out the window. (That's why the 737 autoland CATIII has a DH of 50' instead of the 100' Alert Height of fail-active autoland aircraft)